Effects of different compaction methods on the performance of reinforced earth retaining wall

Geogrid-reinforced earth is an advanced composite material which is widely used in the construction of retaining wall which is often needed in the transportation structure. Different compaction methods have great differences in wall deformation and materials of soil reinforcement strain, which seriously affect the performance of retaining wall. Therefore, it is necessary to further study the influence of different compaction methods on the retaining wall behind the face plate. Through a series of numerical simulation tests, the influence depth of total displacement, tensile load of materials of soil reinforcement, settlement displacement of wall top, and compaction stress is analyzed, and the influence of different compaction methods on reinforced earth retaining wall near face plate is studied. The results show that there is a certain lightweight compaction width between 1 and 2 m, which makes the wall appear a “bow” shape with zero deformation at the top of the panel. When the lightweight compaction width is less than 0.5 m, the tensile load of the materials of soil reinforcement near the face plate changes significantly. When the stress is greater than 2 m, the internal stress and the stress difference between the two ends of the materials of soil reinforcement decrease. The deformation trend of the numerical simulation model of each compacted plate is consistent with the total displacement of the plate and the tensile load of the materials of soil reinforcement. The part of the wall top that is more than 4 m from the panel has nothing to do with the light compaction width value. The closer the wall is to the roof, the greater the maximum tensile load, compaction load, soil depth, and stress.